212121321132 has 24 divisors (see below), whose sum is σ = 565656856576. Its totient is φ = 60606091728.

The previous prime is 212121321067. The next prime is 212121321143. The reversal of 212121321132 is 231123121212.

It is a super-2 number, since 2×212121321132² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 212121321099 and 212121321108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262626828 + ... + 1262626995.

Almost surely, 2^212121321132 is an apocalyptic number.

It is an amenable number.

212121321132 is an abundant number, since it is smaller than the sum of its proper divisors (353535535444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212121321132 is a wasteful number, since it uses less digits than its factorization.

212121321132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525253837 (or 2525253835 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

Adding to 212121321132 its reverse (231123121212), we get a palindrome (443244442344).

The spelling of 212121321132 in words is "two hundred twelve billion, one hundred twenty-one million, three hundred twenty-one thousand, one hundred thirty-two".